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參數(shù)資料
| 型號(hào)： | IMISG543CYB |
| 英文描述： | CPU System Clock Generator |
| 中文描述： | CPU系統(tǒng)時(shí)鐘發(fā)生器 |
| 文件頁(yè)數(shù)： | 1/8頁(yè) |
| 文件大小： | 159K |
| 代理商： | IMISG543CYB |
IMISG501
SYSTEM CLOCK CHIP
March 1996
REDUCED EMI CLOCK GENERATOR
INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.
MILPITAS, CA 95035 TEL: 408-263-6300 FAX 408-263-6571
Page 1of 8
PRODUCT FEATURES
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Generates CPU Clock Signals for Microprocessor
Systems
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Reduces Measured EMI by 10 db nominal
4V to 7V Operating Supply Range
Supports 80286-, 80386-, 80486-, Pentium
- and
29000-based designs
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Wide range of selectable output frequencies
including 50, 25, 20 and 10 Mhz
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single, low cost crystal used as reference
frequency
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Glitch-free switching
50% duty cycle
Power down mode for low power consumption
TTL or CMOS compatible outputs with 6mA drive
capability
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Low, short- and long-term jitter
16 PDIP and 16 Pin SOIC (300 mil body) package
options
BLOCK DIAGRAM
SPECTRUM
SPREAD
CLOCK GEN
REF
/4 OR /12
/2
PRCLK
MPCLK
44.2 MHz
MPSEL
LF
S0
S1
TEST
SSON
9
16
8
7
10
5
2
3
14
12
PRODUCT DESCRIPTION
The IMISG501 is a spectrum spread clock generator
specially designed for personal computers, laser
printers and other digital systems. IMISG501 uses a
patent pending concept to generate popular clock
frequencies that are intentionally broadbanded to
reduce
electromagnetic
attenuates the radiated emission amplitudes from
products associated with either the clock harmonics or
any signals derived from the clock signals nominally 10
db and could significantly reduce the cost of complying
with the regulatory requirements.
interference.
IMISG501
PRCLK is the broadbanded output and can be
programmed to generate 50, 25, 20 and 10 Mhz with
S0 and S1 pins. A single, low cost external crystal is
required as reference frequency for the synthesizer.
Output modulation function can be turned off with the
SSON pin. Several power down modes add the
flexibility to operate the device in a completely static
mode to reduce standby currents and simplify system
board tests.
PDIP/SOIC CONNECTION DIAGRAM
APPLICATIONS
IMISG501 eliminates the need for multiple oscillators
and generates the CPU clock signals for personal
computers, laser printers and other digital systems.
Supports 8086-, 80286-, 80386-, 80486-, Pentium
-
and 29000-based designs. IMISG501 can be used with
laptop or notebook computers to save power by
running the system slower than normal CPU speeds or
completely disabling the clocks in standby mode.
VDD
OSCin
OSCout
VSS
MPSEL
AVDD
S0
S1
TEST
VDD
MPCLK
VSS
PRCLK
AVSS
LF1
SSON
PATENT PENDING
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
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| IMISG543DYB | CPU System Clock Generator |
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| IMISG571DTB | CPU System Clock Generator |
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| IMISG577CYB | CPU System Clock Generator |
相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| IMISG543DYB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CPU System Clock Generator |
| IMISG552BYB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CPU System Clock Generator |
| IMISG556BYBD | 制造商:I.M.I. 功能描述:99.8 MHZ, PROC SPECIFIC CLOCK GENERATOR, PDSO28 |
| IMISG571DTB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CPU System Clock Generator |
| IMISG571DYB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CPU System Clock Generator |
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